Proviron or Pro-v is an interesting drug. Proviron is technically a steroid. Proviron has no anabolic activity though. Its clinical use is to replace androgen content in the male for men who are being treated for low sperm count and also low sex drive. For the purpose of fertility, pro-v is also combined with many other drugs. For our purposes, think of it as a dual drug for zilching out estrogen as well as offering some insurance against a loss of libido during your cycles. This is an awesome benefit. Personally I have used pro-v with a deca only cycle when trying to stay away from test (I am an androgen head), and pro-v did a noticeable job at keeping my sex drive up to where it usually is when I am on test. It was able to accomplish this great feat with only one, 50mg tab a day. I used IP’s little yellow tabs. Don’t know if you’ve seen them but they are great. To be truthful, I don’t really know if they are made anymore. Either way, 50mg of a legit pro-v per day will offer you great assurance in sustaining your libido. I realize that I speak of this often, but it is key to being able to enjoy your cycles and I find it is also closely related to appetite. This is completely anecdotal but when the sex drive is high, the appetite tends to be high, and you can grow much better with less anabolic steroids. I would trade a ravenous appetite any day over being on a ton of juice with no appetite when bulking and mass is the goal. It is the food after all, that allows the juice to work its magic.